Switch Module Architecture - Pickering 40-880A User Manual

SECTION 4 - PROGRAMMING GUIDE

SWITCH MODULE ARCHITECTURE

The 40-880A is a terminated RF changeover switch available with two, four, six or eight banks. A signal path is
made by activating a connection between the common terminal and channel 1 or channel 2 of the switch. The
default (un-powered) state of all banks is with both channels terminated into 50Ω and the common open circuit. The
architecture of the switches is shown in the diagrams below:
SWITCH 1
50Ω
C1
50Ω
SWITCH 2
50Ω
C2
50Ω
40-880A-001 Dual
SPDT RF Switch
SWITCH 1
50Ω
C1
50Ω
SWITCH 2
50Ω
C2
50Ω
SWITCH 3
50Ω
C3
50Ω
SWITCH 4
50Ω
C4
50Ω
40-880A-002 Quad
SPDT RF Switch
Depending upon the model variant, the multiplexer is treated as two, four, six or eight programming sub-unit as
shown in the table below. The following page gives some simple examples using the provided drivers: the Direct I/O
driver, the VISA driver and the IVI driver.
Module Types
40-880A-001/002/003/004
40-880A-001/002/003/004
40-880A-002/003/004
40-880A-002/003/004
40-880A-003/004
40-880A-003/004
40-880A-004
40-880A-004
50Ω SPDT TERMINATED 8GHz RF SWITCH 40-880A
Page 4.2
1.1
1.2
2.1
2.2
SWITCH 1
C1
SWITCH 2
C2
SWITCH 3
1.1
C3
1.2
SWITCH 4
2.1
C4
2.2
SWITCH 5
3.1
C5
3.2
SWITCH 6
4.1
C6
4.2
40-880A-003 Hex
SPDT RF Switch
Sub Unit Number
1
2
3
4
5
6
7
8
1.1
50Ω
1.2
50Ω
50Ω 2.1
50Ω 2.2
3.1
50Ω
3.2
50Ω
50Ω 4.1
50Ω 4.2
5.1
50Ω
5.2
50Ω
50Ω 6.1
50Ω 6.2
Sub Unit Type
MUX(2x1)
MUX(2x1)
MUX(2x1)
MUX(2x1)
MUX(2x1)
MUX(2x1)
MUX(2x1)
MUX(2x1)
pickering
SWITCH 1
50Ω
C1
50Ω
SWITCH 2
50Ω
C2
50Ω
SWITCH 3
50Ω
C3
50Ω
SWITCH 4
50Ω
C4
50Ω
SWITCH 5
50Ω
C5
50Ω
SWITCH 6
50Ω
C6
50Ω
SWITCH 7
50Ω
C7
50Ω
SWITCH 8
50Ω
C8
50Ω
40-880A-004 Octal
SPDT RF Switch
Description
RF Switch 1
RF Switch 2
RF Switch 3
RF Switch 4
RF Switch 5
RF Switch 6
RF Switch 7
RF Switch 8
1.1
1.2
2.1
2.2
3.1
3.2
4.1
4.2
5.1
5.2
6.1
6.2
7.1
7.2
8.1
8.2